/* ====================================================
   ANIMATIONS CSS — Cabinet Maître LEMKHAIRI
   Sobriété institutionnelle — pas d'effets "startup"
   Uniquement : fade-in, slide-up, underline hover
   ==================================================== */

/* ===== FADE IN AU SCROLL (Intersection Observer) ===== */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Délais en cascade pour les grids */
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }
.fade-in:nth-child(5) { transition-delay: 0.4s; }
.fade-in:nth-child(6) { transition-delay: 0.5s; }

/* Variante slide depuis la gauche */
.slide-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Variante slide depuis la droite */
.slide-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ===== UNDERLINE ANIMÉ SUR LES LIENS NAV ===== */
.nav-link-underline {
  position: relative;
  text-decoration: none;
}

.nav-link-underline::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0%;
  height: 1.5px;
  background-color: var(--color-accent-warm);
  transition: width var(--transition-base);
}

.nav-link-underline:hover::after,
.nav-link-underline[aria-current="page"]::after {
  width: 100%;
}

/* ===== TRAIT CUIVRE ANIMÉ SOUS LES TITRES ===== */
@keyframes expandLine {
  from { width: 0; }
  to   { width: 3rem; }
}

.title-underline--animated {
  animation: expandLine 0.6s ease forwards 0.3s;
  width: 0;
}

/* ===== HOVER CARD — Élévation subtile ===== */
.card-hover {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

/* ===== FAQ ACCORDION ===== */
.faq-item {
  border-bottom: 1px solid var(--color-border-soft);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.4rem 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  gap: 1rem;
  transition: color var(--transition-base);
}

.faq-question:hover {
  color: var(--color-accent-primary);
}

.faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 1.5px solid var(--color-accent-warm);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base), background-color var(--transition-base);
  color: var(--color-accent-warm);
  font-size: 1rem;
  line-height: 1;
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background-color: var(--color-accent-warm);
  color: #fff;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-answer-inner {
  padding: 0 0 1.4rem 0;
  color: var(--color-text-secondary);
  font-size: 0.98rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 600px;
}

/* ===== SCROLL TO TOP ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scroll-to-top {
  animation: fadeInUp 0.3s ease forwards;
}

/* ===== RESPECT DES PRÉFÉRENCES UTILISATEUR ===== */
@media (prefers-reduced-motion: reduce) {
  .fade-in,
  .slide-in-left,
  .slide-in-right {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .title-underline--animated {
    width: 3rem;
    animation: none;
  }

  .faq-answer {
    transition: none;
  }
}